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Connecting the Caterpillar Electronic Technician (Cat ET) to the Electronic Control Module (ECM)
Table 1
Tools Needed Qty
Personal Computer (PC) 1
Single user license for Cat ET
Use the most recent version of this software.
"JERD2124" 1
Software
Data subscription for all engines
"JERD2129" 1
171-4400 Communication Adapter Gp (1) 1
275-5120 Communication Adapter Gp(2) 1
7X-1414 Adapter Cable 1
237-7547 Adapter Cable As(3) 1
(1) This item includes the 171-4401 Communication Adapter As.
(2) This item includes the 275-5121 Communication Adapter As. The 7X-1700 Communication Adapter Gp may also be used.
(3) This cable connects to the USB port on computers that are not equipped with a serial port.Cat ET is designed to run on a personal computer. For more information regarding the use of Cat ET and of the PC requirements for Cat ET, refer to the documentation that accompanies your Cat ET software.Cat ET can display the following information:
Parameters
Diagnostic codes
Event codes
Engine configuration
Status of the monitoring systemCat ET can perform the following functions:
Engine monitoring
Diagnostic tests
Sensor calibration
Flash downloading
Set parametersThe engine's power supply provides the communication adapter with 24 VDC. Use the following procedure to connect Cat ET and the communication adapter to the engine.
Turn the engine control switch to the OFF/RESET position.
Illustration 1 g01221508
Connecting the communication adapter
(1) Personal Computer (PC)
(2) 237-7547 Adapter Cable As
(3) 196-0055 Adapter Cable As
(4) 275-5121 Communication Adapter As
(5) 275-5122 Adapter Cable As
(6) 157-4829 Cable Adapter Note: Items (3), (4), and (5) are part of the 275-5120 Communication Adapter Gp. The 171-4400 Communication Adapter Gp or the 7X-1700 Communication Adapter Gp may also be used.
Connect cable (3) to the RS232 serial port of PC (1). Note: If your PC is not equipped with a serial port, use the 237-7547 Adapter Cable As (2) in order to connect to the USB port. Connect one end of the adapter to the end of cable (3). Connect the other end of the adapter to a USB port on the PC.
Connect cable (3) to communication adapter (4).
Connect cable (5) to communication adapter (4).
Connect cable (5) to cable (6).
Connect cable (6) to the service tool connector of the terminal box. Alternatively, connect the cable to the service tool connector on the optional control panel.
Turn the engine control switch to the STOP position. The engine should be OFF. If Cat ET and the communication adapter do not communicate with the ECM, refer to Troubleshooting, RENR5910, "Electronic Service Tool Will Not Communicate With ECM".Recommendations for Programming the System Configuration Parameters
For descriptions of the parameters, refer to Systems Operation, "Electronic Control System Parameters". The values of the parameters can be viewed on the "Configuration" screen of Cat ET.Programmable parameters enable the engine to be configured in order to meet the requirements of the application. The system configuration parameters must be programmed when the application is installed. Perform this programming before the initial engine start-up.Data from a gas analysis and data on engine performance are required in order to determine the correct settings for the fuel quality and for the specific gravity of the gas. Incorrect programming of parameters may lead to complaints about performance and/or to engine damage.If an ECM is replaced, the appropriate parameters must be copied from the original ECM. This can be done with the "Copy Configuration" feature of Cat ET. Alternatively, the settings can be recorded on paper and then programmed into the new module.
Changing the parameters during engine operation can cause the engine to operate erratically. This can cause engine damage.Only change the settings of the parameters when the engine is STOPPED.
Changing the Settings of the Monitoring System
For descriptions of the monitoring system parameters, refer to Systems Operation, "Engine Monitoring System".To change the settings of the parameters, use Cat ET and select the "Service/Monitoring System" screen.Use care when you program the trip points and the delay times. Ensure that the response of the ECM is correct for the application. The monitoring system will accept any settings within the ranges.Refer to Systems Operation for the default setting for the system configuration parameters.
Changing the parameters during engine operation can cause the engine to operate erratically. This can cause engine damage.Only change the settings of the parameters when the engine is STOPPED.